Features：
1. Adult arm, realistic skin and blood vessel
2. Built-in electronic device to simulate pulse
3. Correct puncture gives realistic feedback and simultaneous blood ejecting
4. Mechanical rotation device to shift used blood vessel
5. Skin and blood vessel are replaceable
6. Practise blood gas analysis, artery puncture
7. With electric circulation device, the radial artery can be pulsed autonomously, the pulse frequency can be adjusted, and the pulse can be touched and the feeling is real
